Today, rain possible in São Paulo and Rio at 6 p.m.; Recife sunny

São Paulo: high of 24°C, with rain likely at 6 p.m.

Today, São Paulo is forecast to be sunny with occasional rain, with a low of 18°C, a high of 24°C and a 60% chance of rain; 2 mm is forecast. At 6 a.m., cloudy skies are forecast, with a temperature of 18°C and a 40% chance of rain.

At 9 a.m., sunshine is forecast, with a temperature of 20°C and a 10% chance of rain. Cloudy conditions are forecast for 3 p.m., with a temperature of 23°C and a 10% chance of rain. The highest chance of rain is forecast for 6 p.m.: 90%, with a temperature of 20°C. Taking an umbrella at that time is an optional precaution.

Rio, Recife and Brasília: clouds in Rio, sunshine elsewhere

In Rio de Janeiro, cloudy skies with occasional sunshine are forecast today, with a low of 22°C, a high of 25°C and a 30% chance of rain. Humidity at 6 a.m. is forecast at 97%, while the chance of rain is 40% at 9 a.m. and 90% at 6 p.m.

In Recife, sunshine is forecast, with a low of 25°C, a high of 31°C and a 10% chance of rain. Clear skies are forecast at noon, with a temperature of 31°C. Sunshine is also forecast in Brasília, with a low of 19°C and a high of 30°C. At 3 p.m., humidity is forecast at 31% and the temperature at 30°C.

Air, heat and mosquitoes: what to watch in the four capitals

Air quality is good in Rio de Janeiro, Recife and Brasília, while São Paulo's daily reading is listed as slightly polluted. In Brasília, air quality at noon is forecast to be excellent. The driving index is excellent in all four cities.

The mosquito index indicates strong activity in São Paulo, Rio, Recife and Brasília, with full protection recommended. The WBGT heat stress risk index indicates attention in Rio and caution in Recife, and low risk in São Paulo and Brasília.